Question

1. A train is moving north at 5 m/s on a straight track. The engine is causing it to accelerate northward at 2 m/s^2.

Answer 1

Answer:

It will go up to 93.75 m before it is moving at 20 m/s

Explanation:

As we know that

$v^2 - u^2 = 2aS$

here v is the final speed i.e 20 m/s

u is the initial speed i.e 5 m/s

a is the acceleration due to gravity i.e 2 m/s^2

Substituting the given values in above equation, we get -

$20^2 - 5^2 = 2*2*S\\S = 93.75$meters